<template>
    <div class="app-container">
        <!-- 顶部 header 区域 -->
        <mt-header fixed title="黑马程序员"></mt-header>
        <!-- 中间部分放 router-view 根据路由匹配展示对应组件  -->
		<transition>
			<router-view></router-view>
		</transition>
        
        <!-- 底部 tabbar 区域 -->
        <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item" to="/shopcart">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart">
					<span class="mui-badge">0</span>
				</span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
        
    </div>
    
</template>

<script>

</script>

<style lang="scss" scoped>
.app-container {
    padding-top: 40px;
	overflow-x: hidden; // 因为当两个组件切换的时候，页面宽度变成原来的两倍，因此需要加这个属性消除横向拉条
}

/* 
设置 tab 栏切换动画
1. 设置从右侧屏幕外进入
2. 设置从左侧划出
 */
 .v-enter {
	 opacity: 0;
	 transform: translateX(100%);
 }
 .v-leave-to {
	 opacity: 0;
	 transform: translateX(-100%);
	 position: absolute; // 去除了页面进入的时候从下往上的现象
 }
 .v-enter-active,
 .v-leave-active {
	 transition: all 1s ease;
 }
</style>

